ca253f6ebf Make deriveaddresses use stop/[start,stop] notation for ranges (Pieter Wuille)
1675b7ce55 Use stop/[start,stop] notation in importmulti desc range (Pieter Wuille)
4566011631 Add support for stop/[start,stop] ranges to scantxoutset (Pieter Wuille)
6b9f45e81b Support ranges arguments in RPC help (Pieter Wuille)
7aa6a8aefb Add ParseRange function to parse args of the form int/[int,int] (Pieter Wuille)
Pull request description:
This introduces a consistent notation for RPC arguments in `scantxoutset`, `importmulti`, and `deriveaddresses`, either:
* `"range" : int` to just specify the end of the range
* `"range" : [int,int]` to specify both the begin and the end of the range.
For `scantxoutset`, this is a backward compatible new feature. For the two other RPCs, it's an incompatible change, but neither of them has been in a release so far. Because of that non-released reason, this only makes sense in 0.18, in my opinion.
I suggest this as an alternative to #15496, which only makes `deriveaddresses` compatible with `importmulti`, but not with the existing `scantxoutset` RPC. I also think `[int,int]` is more convenient than `{"start":int,"stop":int}`.
I realize this is technically a feature added to `scantxoutset` after the feature freeze. If desired, I'll drop the `scantxoutset` changes.
Tree-SHA512: 1cbebb90cf34f106786dbcec7afbf3f43fb8b7e46cc7e6763faf1bc1babf12375a1b3c3cf86ee83c21ed2171d99b5a2f60331850bc613db25538c38b6a056676
